observablehq / observablehq/plot
invalid markerEnd option for link/arrow
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bug
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- HTML
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Description
the current markerEnd: "arrow-reverse" has no effect for both link and arrow.
Not sure if it's the design choice or bug.
Plot.link(data, {
markerEnd: "arrow-reverse"
})
if it's the choice then the following line should change to Exclude<Marker, "arrow-reverse"> for link | arrow
https://github.com/observablehq/plot/blob/0032c11160e6340ce44307675d93bed382d10446/src/marker.d.ts#L93
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First steps
- Read the whole issue, then the project's contributing guide.
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- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
Research direction
Start at src/marker.d.ts line 93 and trace how markerEnd is handled for link and arrow. Determine whether arrow-reverse is intentionally unsupported or whether the runtime behavior is incorrect. Done means the option's type definition and behavior are aligned with the chosen outcome.
Written by the indexing model from the issue text.
Assessment
- Tech stack
- typescript
- Domain
- data-visualization
- Issue type
- Bug
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Activity status
- Stale
- Clarity
- Mostly clear
- Newbie friendliness
- 38/100